So, all it ultimately amounts to is nothing?

–Kei Niitoki

Kei Niitoki (新刻 敬, Nītoki Kei) is a character from Boogiepop and Others. She is the President of the Discipline Committee, and had a crush on Keiji Takeda, before being rejected.


Despite her childish appearance, Kei is a mature person, who is often thought of by others as someone to rely on, or as a "big sister" of sorts. Despite this, Kei isn't actually that happy about taking on everyone's troubles, but instead is simply the type of person who cannot say no to others, causing her to shoulder many people's unnecessary troubles. She also has an obsession with making things proper and neatly arranged, more instinctively than conciously. Even though she took the role of President of the Discipline Committee, she isn't particularly invested in the position, only attending meetings as a formality, and overlooking many of her friends who break the school's rules.

She previously confessed her feelings to Keiji Takeda, but was rejected, as the boy was instead in love with Touka Miyashita. Even so, Kei demonstrated her maturity when she appeared to get over the situation quickly and continued to speak to her two schoolmates. However, although she didn't let it show on the outside, Kei actually did have some problems coping with her heartbreak, and also tried to avoid meeting Keiji without mentally preparing herself first.

During the King of Distortion incident, her heart's anxieties manifested as Masami Saotome, who imprinted himself into her memory after he told her that he loved how strong her will was, during the fight with the Manticore. This moment remained in her heart, as she could tell he truly was in love with her at that moment, and was disturbed by the revelation that love could be harmful and evil. After confronting and getting over this side of her, which took the form of the King of Distortion, she finally had the strength to face Keiji, and overcome her heartbreak.


Despite her high-school age, Kei looks much younger than any of the other students. She is short, with short, wavy brown hair tied in two pigtails, and large brown eyes. She is shown wearing the white Shinyo Academy female sailor uniform, with the addition of the yellow Discipline Committee armband, which she holds around her left arm.

In the anime, Kei has longer black hair, still tied in pigtails, and wears the female Shinyo Academy uniform, consisting of a blue blazer over a white shirt with a red ribbon tied around the collar, and a pale blue skirt, with the addition of the Disciplinary Committee armband, green this time, around her left arm.


Kei is a normal high-school student. She once confessed her love to Keiji Takeda, but was rejected.


Boogiepop and Others

Boogiepop Phantom

Boogiepop Returns: VS Imaginator Part 2

Boogiepop Overdrive: The Piper


  • Kei's last name, Niitoki, is written with the characters for "new" and "time".
  • Kei's first name means "respect", perhaps referencing her respectable position as Discipline Committee President.